<?php

function shmop_open(int $key, string $mode, int $permissions, int $size): Shmop|false
{
}

function shmop_read(Shmop $shmop, int $offset, int $size): string
{
}

/**
 * @deprecated
 */
function shmop_close(Shmop $shmop): void
{
}

function shmop_size(Shmop $shmop): int
{
}

function shmop_write(Shmop $shmop, string $data, int $offset): int
{
}

function shmop_delete(Shmop $shmop): bool
{
}

final class Shmop
{
}
